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accel/ivpu: Fix sporadic VPU boot failure 

Wait for AON bit in HOST_SS_CPR_RST_CLR to return 0 before
starting VPUIP power up sequence, otherwise the VPU device
may sporadically fail to boot.

An error in power up sequence is propagated to the runtime
power management - the device will be in an error state
until the VPU driver is reloaded.

Fixes: 35b137630f ("accel/ivpu: Introduce a new DRM driver for Intel VPU")
Cc: stable@vger.kernel.org # 6.3.x
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
Reviewed-by: Krystian Pradzynski <krystian.pradzynski@linux.intel.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230607094502.388489-1-stanislaw.gruszka@linux.intel.com
This commit is contained in:
Andrzej Kacprowski 2023-06-07 11:45:02 +02:00 committed by Stanislaw Gruszka
parent b563e47957
commit a3efabee58
2 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/accel/ivpu/ivpu_hw_mtl.c
View File

@ -197,6 +197,11 @@ static void ivpu_pll_init_frequency_ratios(struct ivpu_device *vdev)
hw->pll.pn_ratio = clamp_t(u8, fuse_pn_ratio, hw->pll.min_ratio, hw->pll.max_ratio);
}
static int ivpu_hw_mtl_wait_for_vpuip_bar(struct ivpu_device *vdev)
{
return REGV_POLL_FLD(MTL_VPU_HOST_SS_CPR_RST_CLR, AON, 0, 100);
}
static int ivpu_pll_drive(struct ivpu_device *vdev, bool enable)
{
struct ivpu_hw_info *hw = vdev->hw;
@ -239,6 +244,12 @@ static int ivpu_pll_drive(struct ivpu_device *vdev, bool enable)
ivpu_err(vdev, "Timed out waiting for PLL ready status\n");
return ret;
}
ret = ivpu_hw_mtl_wait_for_vpuip_bar(vdev);
if (ret) {
ivpu_err(vdev, "Timed out waiting for VPUIP bar\n");
return ret;
}
}
return 0;
@ -256,7 +267,7 @@ static int ivpu_pll_disable(struct ivpu_device *vdev)
static void ivpu_boot_host_ss_rst_clr_assert(struct ivpu_device *vdev)
{
u32 val = REGV_RD32(MTL_VPU_HOST_SS_CPR_RST_CLR);
u32 val = 0;
val = REG_SET_FLD(MTL_VPU_HOST_SS_CPR_RST_CLR, TOP_NOC, val);
val = REG_SET_FLD(MTL_VPU_HOST_SS_CPR_RST_CLR, DSS_MAS, val);

1
drivers/accel/ivpu/ivpu_hw_mtl_reg.h
View File

@ -91,6 +91,7 @@
#define MTL_VPU_HOST_SS_CPR_RST_SET_MSS_MAS_MASK BIT_MASK(11)
#define MTL_VPU_HOST_SS_CPR_RST_CLR 0x00000098u
#define MTL_VPU_HOST_SS_CPR_RST_CLR_AON_MASK BIT_MASK(0)
#define MTL_VPU_HOST_SS_CPR_RST_CLR_TOP_NOC_MASK BIT_MASK(1)
#define MTL_VPU_HOST_SS_CPR_RST_CLR_DSS_MAS_MASK BIT_MASK(10)
#define MTL_VPU_HOST_SS_CPR_RST_CLR_MSS_MAS_MASK BIT_MASK(11)